Improvement in padlocks



HQ'SCHROE'DER,

Padlock.

No'. 2073lo Patented Aug. 2o, 1187s.

una

INVENTUH. 1 v Erwan SZ-Zfraealar y N. PEYERS, PNoTo-LITHGGRAPHER.WASHINGTON. D C.

STATES PATENT CFFIC-E.

HERMAN 'scHRonnnR or S'r. LOUIS, MISSOURI, `AssIeNoR ro ERNST n.,voRDTRIEDn on SAMERLAGE.

I'IVIPROVEM ENT IN PADL-OCKS.

Specification forming part of Letters Patent No. 207,310, dated August20, 1G78 application iilcd Y July e, 187e.

To all whom it may concern:

Be it known that I, HERMAN SoHRoEDER, of St. Louis, inthe county'of St.Louis and State of Missouri, have invented an Improved Lock, of whichythe following is a specification:

The object of this invention is to achieve simplicity and cheapness ofconstruction, safety and reliability in operation and use, and inconstructive principle further be adapted for the formation of thevarious kinds of looks ordinarily made.

The invention will iirst be fully described, and the novel constructionand combination of parts will hereinafter be pointed out in the claims.l

Of the drawing, Figures 1 and 2 are plan views of my improved lock,showing its internal mechanism. (Represented in Fig. l in lockedcondition, and in Fig. 2 in unlocked condition.) Figs. 3 and 4. are eachenlarged sectional elevations, taken on lines :c .r and x x',respectively. Fig. 5 is a plan view of the key used for the lock hererepresented.

A is the lock-Casin g. B is the shackle, pivoted at C, and having thenotch at b. (See Figs. 1,2.)

As improved means for locking and unlocking purposes, I have providedthe following parts: C represents the bolt or catch. It consists of aplate shaped to have a projection or catch at c and the projecting armat c, the plane of the latter being deeper than the former, all shown inFigs. 1, 2, 3. rllhe catch c engages with the notch on the shackle, andthe arm c and pin c2 connect the catch c c c to the tumblers, while the.deeper plane eX- istin g in the bolt forms a bearing and guiding surfaceto the operating-tumblers.- The bolt C thus constructed is pivoted inoperative relation to the notch of the shackle. (See Figs. 1 2.)

7In the present lock I show two tumblers, d d1, arranged one on top ofthe other. Each tumbler consists of ,a plate having an open straightSlot, d2, and, as continuation thereof, the diagonal slot d3. (See Figs.1, 2, 3.) Each tumbler is therefore a duplicate of the other so far asthe feature of slots d2 d3 are concerned 5 but it will be noticed thatthe top tumbler has the further slot addition shown at di, Figs. 1, 2,3. The purpose of the slot feature d2 is to manipulate the bolt. The.stationary pin c, which projects `through each of' the tumblers, and theflanges Vact asy guides to the tumblers. (See Figs. 1, 2, 3.)

By means of the diagonal` slot d the tum blers, when acting, impart apart arc movement to the bolt C, thus producing the unlocking action.The open out or slot Z4 is the safeguard feature, to prevent unlockingor opening by picking or false keys. A further feature in the tumblersconsists in forming each of different lengths. (See d", Fig. 3.) Thekey-point is therefore shaped to suit the various changes in the lengthof each tumbler.

In the arrangement of each tumbler the slots in each should be in line,and the rigid as well as movable pin be made to project through thestraight part of each slot. rlhe seatin g of both tumblers is done inpartially closed sides aull a top plate, the latter being represented indotted lines, Figs. 1, 2, adjusted out of its true position.

E and E are coil-springs, arranged as shown in Figs. 1 and 2, land arefor the purpose of restoring the respective tumblers, also thebolt, tooriginal position. F represents the key, its bits at f being of thedifferent lengths to c o r respond to the edges presented bythe tumblersat d5. The key-hole is at bottom of the lock'.

The internal mechanism being thus constructed and arranged, theoperation is as folows: The key is inserted in the key-hole so that thebits f of the key come in contact with the lower edge of each tumbler.Then, by forcing the ,key upward, both tumblers are at same time movedupward. This action permits the pin on the arm of the bolt to travelinto the diagonal slots, and in so doing there is imparted a part arcmovement to said bolt, which carries its catch away from its shackle,leaving the latter free to be opened. (See Fig. 2.) The springs, as soonas the key has been withdrawn, restore the bolt and tumblers to theirtirst position. The lower tumbler, by virtue of its diagonal slot, isvirtually the unlocking-tumbler. The top tumbler has the necessarycomplement of the diagonal slot, but prevents all unlocking actionunless its said diagonal slot is parallel and in line with the same slotin the lower tumbler.

Any action or movement that thrusts the slot feature d* in engagementwith the pin on the locker fails to unlock the lock. Also, the singleoperation of one or the other of the tumblers fails to open the lock.The parallel op eratin g relationship of the slotted tulnblers forms,therefore, a feature of great importance, as it insures a most perfect,secure, reliable, and excellent lock.

Each lock can contain different number .of tumblers capable of being` ofdifferent sizes; hence no two locks are alike, unless purposely made so.

1. In a padlock, the combination of a vertically-acting tumbler havingthe angular slot, asspecied, the bolt device carrying a pin by means ofwhich the said bolt can be operated to'pr'od'uce the unlocking action,substantially in themanner and for the purpose set fortln 2. In apadlock, the combination of the bolt device, consisting of a pivotedcatch and arm, the latter carrying a pin that projects through theangular slots in the tumblers, the vertical acting tumblers havingangular slots, and the additional slot d, whereby the unlocking actionof the bolt is prevented, in the manner and for the purpose set forth.

3. The improved padlock consisting of thc casing A, the bolt C, havingcatch c, arm cl, and carrying-pin c2, the tumblers d dl, having theslots d2 d3, that of d having the additional slot d4, and the springs EE', all said parts being combined to operate by means of a key,

in the manner and for the purposes set forth.

In testimony of said invention I have hereunto set my hand.

HERMAN s oHRoEDER,

Wi tuesses: t

WILLIAM W. HERTHEL, J oHN W. HERTHEL.

